Twinning and recrystallisation as crack tip deformation mechanisms during fracture

被引：33

作者：

Farkas, D ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

来源：

PHILOSOPHICAL MAGAZINE | 2005年 / 85卷 / 2-3期

关键词：

D O I：

10.1080/147864304123313157070

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report atomistic studies of the deformation mechanisms in the crack tip region during low temperature fracture of bcc Fe single crystals. The large-scale scale simulations use empirical potentials to study the crack tip response. The twins are formed by the emission of partial dislocations in adjacent slip planes of the {112} type. In addition to twinning, the results show the nucleation of new grains in the crack tip region. The twinning and stress-induced recrystallisation phenomena are also observed in fully three-dimensional digital samples of nanocrystalline Fe.

引用

页码：387 / 397

页数：11

共 30 条

[1] THE DEFORMATION AND FRACTURE OF ALPHA-IRON AT LOW TEMPERATURES [J].

BIGGS, WD ;

PRATT, PL .

ACTA METALLURGICA, 1958, 6 (11) :694-703

[2] Transonic twinning from the crack tip [J].

Cerv, J ;

Landa, M ;

Machová, A .

SCRIPTA MATERIALIA, 2000, 43 (05) :423-428

[3] STRESS-INDUCED MARTENSITIC TRANSITION IN A MOLECULAR-DYNAMICS MODEL OF ALPHA-IRON [J].

CHEUNG, KS ;

HARRISON, RJ ;

YIP, S .

JOURNAL OF APPLIED PHYSICS, 1992, 71 (08) :4009-4014

[4] DEFORMATION TWINNING [J].

CHRISTIAN, JW ;

MAHAJAN, S .

PROGRESS IN MATERIALS SCIENCE, 1995, 39 (1-2) :1-157

[5] MOLECULAR-DYNAMICS SIMULATION OF CRACK TIP PROCESSES IN ALPHA-IRON AND COPPER [J].

DECELIS, B ;

ARGON, AS ;

YIP, S .

JOURNAL OF APPLIED PHYSICS, 1983, 54 (09) :4864-4878

[6] Embedded atom calculations of unstable stacking fault energies and surface energies in intermetallics [J].

Farkas, D ;

Zhou, SJ ;

Vailhe, C ;

Mutasa, B ;

Panova, J .

JOURNAL OF MATERIALS RESEARCH, 1997, 12 (01) :93-99

[7] Atomistic studies of intrinsic crack-tip plasticity [J].

Farkas, D .

MRS BULLETIN, 2000, 25 (05) :35-38

[8] Intergranular fracture in nanocrystalline metals [J].

Farkas, D ;

Van Swygenhoven, H ;

Derlet, PM .

PHYSICAL REVIEW B, 2002, 66 (06) :601011-601014

[9]

Farkas D, 2001, PHILOS MAG A, V81, P1241, DOI 10.1080/01418610110033984

[10]

FARKAS D, 2001, MRS S P MULT MOD MAT, V653

← 1 2 3 →